An-Naba · At-Takathur

Both use the 'kalla sa/sawfa ta'lamun' warning refrain but 78:4-5 uses 'sa ya'lamun' while 102:3-4 uses 'sawfa ta'lamun' with 'thumma kalla' escalating the second warning.

An-Naba · An-Naba

Consecutive verses both reading 'kalla sa ya'lamun' (No — they shall come to know) — an exact verbatim repetition used for rhetorical emphasis within the same surah.